package com.sky.service.impl;

import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import com.github.pagehelper.Page;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {

    @Autowired
    DishMapper dishMapper;

    @Autowired
    DishFlavorMapper dishFlavorMapper;

    @Autowired
    SetmealDishMapper setmealDishMapper;

    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);

        dishMapper.insert(dish);

        Long dishId = dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();

        if(flavors!=null && flavors.size()>0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page=  dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断删除的dish中有无停售状态的菜品
        Integer count = dishMapper.countStatusIsZ(ids);
        if(count>0) {
            throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
        }
        Integer setmealCount = setmealDishMapper.getSetmealCountByDishIds(ids);
        if (setmealCount>0) {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
//TODO 拼接sql的时候参数错误 不知道为什么
        dishMapper.deleteBatch(ids);
        dishFlavorMapper.deleteBatchByDishId(ids);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    @Override
    public List<DishVO> listWithFlavor(Dish dish) {
        //TODO 一对多嵌套查询，如何用一条sql语句解决
//        List<Dish> dishList = dishMapper.list(dish);
//
//        List<DishVO> dishVOList = new ArrayList<>();
//
//        for (Dish d : dishList) {
//            DishVO dishVO = new DishVO();
//            BeanUtils.copyProperties(d,dishVO);
//
//
//            //根据菜品id查询对应的口味
//            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());
//
//            dishVO.setFlavors(flavors);
//            dishVOList.add(dishVO);
//        }


//        return dishVOList;

        List<DishVO> dishVOList = dishMapper.selectDishAndFlavors(dish);
        return dishVOList;
    }

    @Override
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }


}
